This seat is solid, stable and comfortable, I use it now for over a year without any signs of wear.
You will find it hard to find a better seat for the price.
On design flaw…under the seat you can store your books, a very useful feature. If they would have made the seat a bit wider, you could put 2 A4 books next to each other, unfortunately it lacks a few centimetres.
You can still put a few books so not a major flaw.